Introduction to the characteristics of metal silicon powder
We need to know that a large part of the uses of Si Metal Powder is used in powder form. In this case, silicon blocks or silicon particles need to be mechanically decomposed and then ground into metal silicon powder with a predetermined particle size and the desired chemical composition. However, this method has many disadvantages. This is because the cooling rate of molten silicon must be relatively slow during the ingot casting process. Therefore, if alloying elements added to the silicon melt and impurities contained in the silicon melt are used during the ingot casting process, the segregation tendency is strong and the grains of solid silicon will be coarse. Due to this segregation and coarse primary grains, customers are able to obtain uneven powder products during the mechanical crushing and grinding of the ingot, which is unfavorable for the use of metal silicon powder in many applications. So everyone should pay more attention when using it. In addition, oxides, carbides, nitrides and carbonitrides are formed during the use of metal silicon powder. Even a small amount of these compounds is undesirable. During the crushing and grinding process, silicon is also contaminated by iron due to the wear of the crushing and grinding equipment.
Of course, when the silicon block is crushed and ground, the fracture surface of the silicon particles will be oxidized, so that an undesirable oxide layer will appear on the surface of each silicon particle in the obtained metal silicon powder. The crushing and grinding process will also cause environmental problems in the form of noise and dust, and generate thermal stress. Therefore, it is necessary to provide a method for continuously converting molten silicon flowing out of an electric melting furnace into metal silicon powder. As far as we know, there are many production methods for the general use of metal silicon powder, such as inert gas atomization, liquid atomization, high-speed turntable atomization, etc. However, the known methods for producing metal powder that everyone has seen are intermittent, and they all require a certain amount of metal to melt and atomize, so it is not economical, because these methods have to go through the routine, so it is impossible to continuously turn the molten metal flowing out of the smelting furnace directly into silicon powder. As far as the inventor knows, there is no available method for gas atomization of silicon. Although the use of metal silicon powder is very wide, these places that should be paid attention to cannot be ignored. In short, it is particularly suitable for the production of organosilanes, and the method is to react silicon powder with alkyl chloride or aryl chloride to generate chlorosilane.
After the above introduction, we also have a further understanding of the introduction of the characteristics of the use of metal silicon powder. You won't feel strange when you see him again in the future, and there won't be frequent problems during use. Well, today's content ends here, and I believe it will bring more exciting knowledge points.
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